While this may work for hand made and clothing, it's not going to work for vintage and antiques. If you've ever hired a house appraiser, just ask them how they price a property? It's simple; they find properties in the neighborhood as similar as can be found, and use former sales and factor attributes of each property to establish a current price,
Vintage is no different. There are many variables, such as age, rarity, and condition. Pricing consists of locating like items online through various auction houses and current and past online sales. If an item is unique enough that another cannot be found, then as the seller, I am left as the one to establish the price.
For this, I might set a much higher price in order to find the market. Pricing may also enable me to target a specific type of buyer. My highest sale was over a thousand dollars. I priced this item high enough to target serious collectors. I received numerous offers, but in the end the buyer was exactly who I wanted. And in the meantime, this object garnered more views and favorites than any other item in my store. It brought collateral sales just by being there.
Pricing tool - probably OK for stock items, but for antiques? No way...